What is the number in the * cell? 88 63 25 9 16 24 13 49 * 10 9

Iq test 1

Mathematics is all about logic 

If you think you're good at logic.
Try this iq level problem.

Choose one option from below

Sol  is given below

Hint: Add the digits and observe the stairs sum while going downward

Adding the digit of numbers in the same row

Like 88 and 63 are in the same row and adding their digits gives below number in the next  row which is 25.

8+8+6+3= 25  

Similar pattern everyone learned in 4 th standard ( Multiplication Pyramid )

So this shows a pattern >>

       88        63           
            \      /                   
              25                             

Similarly check for next rows

↠ 25  and 9 gives 16

      2+5+9=16

↠ 16 and 25 gives 13

      1+6+2+4=13

↠ 13 and 49  gives our answer as 17

     1+3+4+9=17

↠ 1+7+1=9  .....end

Therefore >>

Ans: 17