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If a and b are two integers, then which of the following may not be an integer? (a) a + b (b) a – b (c) a × b (d) a ÷ b

The correct answer is (d) a ÷ b Justification If a and b are two integers, then a + b will always be an integer a – b will... View Article

Which of the following shows the maximum rise in temperature? (a) 23° to 32° (b) – 10° to + 1° (c) – 18° to – 11° (d) – 5° to 5°

The correct answer is (b) – 10° to + 1° Justification (a) 23° to 32° = 32° – 23° = 9° (b) 1°... View Article

Which of the following is different from the others? (a) 20 + (-25) (b) (- 37) – (- 32) (c) (- 5) × (-1) (d) (45) ÷ (- 9)

The correct answer is (c) (– 5) × (–1) Justification As all the remaining options give a value of -5 (a) 20 +... View Article

Which of the following does not represent an integer? (a) 0 ÷ (- 7) (b) 20 ÷ (- 4) (c) (- 9) ÷ 3 (d) (- 12) ÷ 5

The correct answer is (d) (– 12) ÷ 5 Justification 0 ÷ (– 7) = 0, an integer 20 ÷ (– 4) = -5, an... View Article

(- 16) ÷ 4 is not same as (a) (- 4) ÷ 16 (b) – (16 ÷ 4) (c) 16 ÷ (- 4) (d) – 4

The correct answer is (a) ( – 4) ÷ 16 Justification (a) ( – 4) ÷ 16= -1/4 (b) – ( 16 ÷ 4)= -4 (c) 16... View Article

(- 43) × (- 99) + 43 is equal to (a) 4300 (b) – 4300 (c) 4257 (d) – 4214

The correct answer is (a) 4300 Justification BODMAS is an acronym and it stands for Bracket, Order, Division, Multiplication, Addition, and... View Article

– 35 × 107 is not same as (a) – 35 × (100 + 7) (b) (- 35) × 7 + (- 35) × 100 (c) – 35 × 7 + 100 (d) (- 30 – 5) × 107

The correct answer is (c) – 35 × 7 + 100 Justification – 35 × 107 = (– 30 – 5) × 107 = – 35... View Article

(- 25) × [6 + 4] is not same as (a) (- 25) × 10 (b) (- 25) × 6 + (- 25) × 4 (c) (- 25) × 6 × 4 (d) – 250

The correct answer is (c) (– 25) × 6 × 4 Justification (– 25) × 6 × 4 (– 25) × [6 + 4]... View Article

[(- 8) × (- 3)] × (- 4) is not equal to (a) (- 8) × [(- 3) × (- 4)] (b) [(- 8) × (- 4)] × (- 3) (c) [(- 3) × (- 8)] × (- 4) (d) (- 8) × (- 3) – (- 8) × (- 4)

The correct answer is (d) (– 8) × (– 3) – (– 8) × (– 4) Justification (– 8) × (– 3)... View Article

Which of the following is the multiplicative identity for an integer a? (a) a (b) 1 (c) 0 (d) – 1

The correct answer is (b) 1 Justification The multiplicative identity of numbers is a property of numbers that are applied when carrying out... View Article

Which of the following is not the additive inverse of a? (a) – (- a) (b) a × (- 1) (c) – a (d) a ÷ (-1)

The correct answer is (a) – (– a) Justification An additive inverse of a number is defined as the value, which on adding... View Article

(- 10) × (- 5) + (- 7) is equal to (a) – 57 (b) 57 (c) – 43 (d) 43

The correct answer is (d) 43 Justification BODMAS is an acronym and it stands for Bracket, Order, Division, Multiplication, Addition, and... View Article

(- 11) × 7 is not equal to (a) 11 × (- 7) (b) – (11 × 7) (c) (- 11) × (- 7) (d) 7 × (- 11)

The correct answer is (c) (– 11) × (– 7) Justification According to the given details We have, (a) 11 x (-7) = -77 (b) –... View Article

Water level in a well was 20m below ground level. During rainy season, rain water collected in different water tanks was drained into the well and the water level rises 5 m above the previous level. The wall of the well is 1m 20 cm high and a pulley is fixed at a height of 80 cm. Raghu wants to draw water from the well. The minimum length of the rope that he can use is (a) 17 m (b) 18 m (c) 96 m (d) 97 m

The correct answer is (a) 17 m Justification According to the given details Height of the wall of the well = 1m 20 cm = 1.2 m Height of the... View Article

The value of 5 ÷ (-1) does not lie between (a) 0 and – 10 (b) 0 and 10 (c) – 4 and – 15 (d) – 6 and 6

The correct answer is (b) 0 and 10 Justification The value of 5 ÷ (–1) = -5 As it is a negative number it doesn’t lie... View Article

On the number line, the value of (-3) × 3 lies on right hand side of (a) – 10 (b) – 4 (c) 0 (d) 9

The correct answer is (a) – 10 Justification (-3) x 3 = -9 So, -9 lies to the right to -10.... View Article

If ⊗, O, and • represent some integers on number line, then descending order of these numbers is

The descending order of these numbers is as in option (c). The correct answer is (c)... View Article

On the following number line value ‘Zero’ is shown by the point (a) X (b) Y (c) Z (d) W

The correct answer is (c) Z Justification It’s observed that each division on the number line is 5 units. So, from 10 taking two... View Article

Which of the following statements is not true? (a) When two positive integers are added, we always get a positive integer. (b) When two negative integers are added we always get a negative integer. (c) When a positive integer and a negative integer is added we always get a negative integer. (d) Additive inverse of an integer 2 is (- 2) and additive inverse of (- 2) is 2.

The statement (c) is not true Justification (a) When two positive integers are added, we always get a positive integer. Example: 2 and 3 are... View Article

The next number in the pattern – 62, – 37, – 12 _________ is (a) 25 (b) 13 (c) 0 (d) -13

The correct answer is (b) 13 Justification – 62, – 37, – 12 _________ Here in the sequence, the common difference... View Article