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  • D* Mental Maths:1. I am a two digit number above 50. The sum of my digits is 12. Difference of my digits is 4. Who am I?2. I am a two digit number. The sum and product of my digits are the same. Who am I?3. If 3=18, 4=32, 5=50 and 6=72 then 8= __________.

D* Mental Maths:1. I am a two digit number above 50. The sum of my digits is 12. Difference of my digits is 4. Who am I?2. I am a two digit number. The sum and product of my digits are the same. Who am I?3. If 3=18, 4=32, 5=50 and 6=72 then 8= __________.?

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best_answer

1) Let ;number; N= 10 imes x+y

x+y=12............................(1)

x-y=4...............................(2)

add eq(1) and eq(2)

x=8 then, y=4

N=10 imes 8 +4=84

2) The sum and product of my digits are the same.

    So the number is 22

    2+2=2 imes 2=4

3)   3=3^2 imes 2=18

     4=4^2 imes 2=32

    5=5^2 imes 2=50

    6=6^2 imes 2=72

    8=8^2 imes 2=128

Posted by

Deependra Verma

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