Qstnid -D-2- 31 &Times; 5 Is Divisible By 3? - 05: Playing With Number Class 8 Maths - Icse-viii-mathematics

Home Learn Fast select Course

Show Unit/Chapter Change Unit Change Subject Last Menu

ICSE-VIII-Mathematics

05: Playing with Number Class 8 Maths

with Solutions - page 3

Qstn# D-2 Prvs-Qstn Next-Qstn

#2
31 × 5 is divisible by 3?
Ans : 31 × 5 is divisible by 3
⇒ 3 + 1 + x + 5 is a multiple of 3
⇒ 9 + x = 0, 3, 6, 9,
⇒ x = -9 , -6, -3, 0, 3, 6, 9,
Since, x is a digit
x = 0, 3, 6 or 9