Question

find the value of x in the following 8:72=9:x​

Answer 1

Answer:

Hey! I hope this helps.

Step 1: 8=72

72= 8×9 i.e n(n+1) where n is 8

Step 2: 2=6

6=2×3 i.e n(n+1) where n is 2

Step 3: 5=30

30=5×6 i.e n(n+1) where n is 5

Using the above logic, 9=9(9+1) = 9×10 = 90