Q1 I thought of a number, double it, subtract 10 and I got 52. What was my number?
Q2 If you add 10 to my number, then multiply the result by 3, you'll get 42. What was my number?
Q3 Multiply my number by 5, add 3 and you'll get 48. What was my number?
Q4 If you triple one-eighth of my number, you get 9. What was my number?
Q5 If you take 4 away from my number, then divide the answer by 3, you'll get 11. What was my number?
Q6 Half of five times my number is 10. What was my number?
Q7 I thought of a number, multiplied by 5, added 13, then divided the result by 7. I got 49. What was my number?
Q8 My two numbers work like this: If you multiple them together, you get 224. If you divide them, you get 14. What are they?
Ans: 4, 56
Q9 My two numbers work like this: If you add them together, you get 106. If you subtract them, you get 12. What are they?
Ans: 47, 59
Q10 The number I'm thinking of is 2 more than a multiple of 7 and 3 less than a multiple of 5. What is it?
Ans: 37, 72, 107, 142, 177... (in steps of 35)
Q11 If you divide your number by 8, the remainder is 2. If you divide it by 9, the remainder is 5. What is it?
Ans: 50, 122, 194, ... (in steps of 72)
Q12 My number is a square number. One-quarter of it is a triangular number. I can think of two answers to this puzzle! Guess what are these 2 answers.
Ans: 4, 256, 2916, ...