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Quantitative Ability

If 742 = 5a7b...

Question

If 74 $^{2}$ = 5a7b, where a and b are single digit natural numbers. Then ba is equal to ______.
A) 7 $^{2}$ B) 8 $^{2}$
C) 9 $^{2}$ D) 10 $^{2}$

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Q. Which of the following statements are true and which are false?

(i) Every whole number has its successor.
(ii) Every whole number has its predecessor.
(iii) 0 is the smallest natural number.
(iv) 1 is the smallest whole number.
(v) 0 is less than every natural number.
(vi) Between any two whole numbers there is a whole number.
(vii) Between any two non-consecutive whole numbers there is a whole number.
(viii) The smallest 5-digit number is the successor of the largest 4 digit number
(ix) Of the given two natural numbers, the one having more digits is greater.
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(xi) If a and b are natural numbers and a < b, than there is a natural number c such that a<b<c.
(xii) If a and b are whole numbers and a<b, then a+1< b+1.
(xiii) The whole number 1 has 0 as predecessor.
(xiv) The natural number 1 has no predecessor.

If 74 $^{2}$ = 5a7b, a and b are single digit natural numbers. Then check if ba is a square number or not.

Q. if 1A into A = B6 where A and B are single digit number such that B - A = 3 then value of A and B are

Q. Given that the unit digits of A3and A are the same where A is a single digit natural number. How many possibilities can A assume ?

\frac{3 + cot (76^{o}) . cot (1^{o})}{cot (76^{o}) + cot (16^{o})} = cot ((a b)^{o})

a b

is a two digit natural number then

\frac{a \times b}{a + b}

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