[1 Mark Question Answer]

Question 11 Mark

Find which of the following numbers are divisible by $10:\ (i) \ 5100\ (ii) \ 4612\ (iii) \ 3400 \ (iv) \ 8399 $

Answer

A number having its unit digit $0,$ is divisible by $10.$
So, $5100, 3400$ are all divisible by $10$.

Question 21 Mark

Find which of the following numbers are divisible by $5 :\ (i) \ 3250 \ (ii) \ 5557\ (iii) \ 39255\ (iv) \ 8204\ $

Answer

A number having its unit digit $5$ or $0$, is divisible by $5.$
So, $3250, 39255$ are all divisible by $5.$

Question 31 Mark

Find which of the following numbers are divisible by $4\ :\ (i) \ 360\ (ii) \ 3180\ (iii)\ 5348\ (iv) 7756$

Answer

A number is divisible by $4$, if the number formed by the last two digits is divisible by $4.$
So, Number $360, 5348, 7756$ are divisible by $4.$

Question 41 Mark

Find which of the following numbers are divisible by $3:\ (i)\ 261\ (ii)\ 777\ (iii) \ 6657\ (iv) \ 2574$

Answer

A number is divisible by $3$ if the sum of its digits is divisible by $3,$
So, $261, 777, 6657,2574$ are divisible by $3$.

Question 51 Mark

Find which of the following numbers are divisible by $2:\ (i) \ 192\ (ii)\ 1660\ (iii)\ 1101\ (iv) \ 2079$

Answer

A number having its unit digit $2,4,6,8$ or $0$ is divisible by $2,$
So, Number $192, 1660$ are divisible by $2$.

MATHS [1 Mark Question Answer]