Question

the sum of 2 numbers which are in a ratio 2:5 is 21 what are the numbers​

Answer 1

Ratio = 2 : 5

Numbers = 2x & 5x

$2x + 5x = 21 \\ 7x = 21 \\ x = 21 \div 7 \\ x = 3$

Numbers :-

2x = 2 × 3 = 6

5x = 5 × 3 = 15.

The numbers are 6 & 15.