Question

9. Who am I?
Find a two-digit number divisible by
a) 4 if the difference between the two digits is 3
b) 9 if the tens digit is twice the one's digits.
c) 10 if the sum of two digits is 5
d) 6 if the product of the two digits is 14

Answer 1

Answer:

d) 6 if the product of the two digits is 14

Answer 2

Concept:

The study of the set of positive whole numbers, such as 1, 2, 3, 4, 5, and so on, is aided by the field of mathematics known as number theory. This set is also known as the set of natural numbers and is occasionally referred to as "higher arithmetic." Studying the connections between various types of numbers is made easier by number theory.

Given:

Two digit number

Find:

a) 4 if the difference between the two digits is 3

b) 9 if the tens digit is twice the one's digits.

c) 10 if the sum of two digits is 5

d) 6 if the product of the two digits is 14

Solution:

a)96 is divisible by 4 and its difference is also 3

b)63 is divisible by 9 and the tens digit is twice the one's digits.

c)50 is divisible by 10 and the sum of its digits is 5

d) 72 is divisible by 6 and the product of two digits is 14

Therefore, a)96

b)63

c)50

d)72

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