@Loh Jane,
Loh Jane wrote:
Hi Math Teachers,
please guide me how to solve the following question, thanks in advance.
I am a 2-digit number.
I am greater than 15 and smaller than 20.
My digits add up to 10.
I am?
Guide to solving the question:
1. Read the question
2. Use your BRAIN!!!!
You are looking for a number greater than 15, smaller than 20. THINK about this! How many could there be? The first number must be 16. Go up one: 17. Go up one again: 18. Go up one more: 19. If you go up any more you get to 20 and you you know the number you want is less than 20. So you no know it must be of 16, 17, 18 or 19. Add the digits of each: 1+6 =7, no good; 1+7=8, no good, 1+8=9 no good, 1+9=10 BINGO!!!
You are seriously telling us you could not do this? Should you be taking a math class?
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