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Byju's Answer

Standard IV

Mathematics

Geometric Sequences

5+3=10, 7+4=3...

Question

$5 + 3 = 10, 7 + 4 = 35, 10 + 2 = 45, then 8 + 6 = ? ? $

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Solution

Here the pattern used is (No. x previous no.)/2
So, the required number will be $8 + 6 = \frac{8 \times 7}{2} = 28$
Hence, $28$ is our required answer.

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Similar questions

Q. Find the value of:

(1) 3⁶
(2) 6³
(3) 2⁶
(4) 1⁸
(5) 5⁴
(6) 4³
(7) 10⁵
(8) 10⁷
(9) 7⁴
(10) 8²

Q. Practice Time
Complete the following:
2 × 7 = __________
4 × 9 = __________
5 × 8 = __________
10 × 6 = __________
5 × 9 = __________
3 × 9 = __________
5 × 2 = __________
3 × 10 = __________
2 × 8 = ___________
10 × 8 = ___________

Write the cubes of:

(1) −2

(2) +1

(3) −5

(4) +7

(5) −10

(6) 2

(7) 3

(8) 10

(9)

(10)

Write these as you read them.

(1) 2³

(2) 3⁵

(3) 6⁷

(4) 10¹⁰

(5) (−2)⁵

(6)

(7) (3²)²

(8) 4×3²

(9) (7³)⁵

(10) (−3)⁷

Solve:

(i) $2 - \frac{3}{5}$

(ii) $4 + \frac{7}{8}$

(iii) $\frac{3}{5} + \frac{2}{7}$

(iv) $\frac{9}{11} - \frac{4}{15}$

(v) $\frac{7}{10} + \frac{2}{5} + \frac{3}{2}$

(vi) $2 \frac{2}{3} + 3 \frac{1}{2}$

(vii) $8 \frac{1}{2} - 3 \frac{5}{8}$

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5+3=10,7+4=35,10+2=45,then8+6=??​

Here the pattern used is (No. x previous no.)/2So, the required number will be 8+6=8×72=28Hence, 28 is our required answer.

$5 + 3 = 10, 7 + 4 = 35, 10 + 2 = 45, then 8 + 6 = ? ? $

Here the pattern used is (No. x previous no.)/2
So, the required number will be $8 + 6 = \frac{8 \times 7}{2} = 28$
Hence, $28$ is our required answer.