Self Maths Puzzle

2+3=10,3+6=27,6+9=90
what is 5+15=?

Read Solution (Total 4)

2+3=5
5*2=10
3+6=9
9*3=27
6+9=15
15*6=90
5+15=20
20*5=100
so ans is 100
12 years agoHelpfull: Yes(2) No(0)

2+3=5
5*2=10
3+6=9
9*3=27
6+9=15
15*6=90
5+15=20
20*5=100
so ans is 100
12 years agoHelpfull: Yes(1) No(0)
100

2 + 3=5*2=10

3+6 =9*3=27
6+9=15*6=90

5+15=20*5=100
12 years agoHelpfull: Yes(0) No(0)
2+3=10,3+6=27'6+9=90,5+15=100.so ans is 100.every sum value multiply its fist no.
12 years agoHelpfull: Yes(0) No(0)

Self Other Question

Given that 2^2004 is a 604-digit number whose first digit is 1, how many elements of the set S = {2^0,2^1,2^3...,2^2003} have a first digit of 4? using five zeros produce sum greater than 100.use any mathematical operation.