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1. What comes next in the sequence: 21, 64, 32, 16, __?
A. 4
B. 8
C. 32
D. 64
2. In the Collatz Conjecture, if a number is odd, the next step is to:
A. Divide it by 2
B. Multiply it by 3 and add 1
C. Subtract 1
D. Multiply it by 4
3. What is the sum of 1500 + 1500 + 400?
A. 2000
B. 2900
C. 3400
D. 4000
4. Which of these sums to exactly 10,000?
A. 3500 + 5000 + 200
B. 3000 + 4500 + 1500
C. 2500 + 6000 + 1500
D. 4000 + 4000 + 1000
5. Which of these is closest to 50,000?
A. 45,000
B. 52,000
C. 49,500
D. 39,500
6. The date 20/12/2012 forms a special pattern because:
A. It uses only even numbers
B. It reads the same backward
C. The digits repeat
D. It is a prime number
7. Which of the following is a palindromic date?
A. 11/02/2011
B. 12/12/2013
C. 13/01/2015
D. 10/11/2020
8. Estimate how many words are in a small book with about 50 pages.
A. 500
B. 5000
C. 10,000
D. 50,000
9. Approximately how many steps would you take to walk across a large football field?
A. 50
B. 200
C. 500
D. 1000
10. How many digits does a five-digit number have?
A. 4
B. 5
C. 6
D. 7
11. What is the sum of the smallest and largest 5-digit palindrome?
A. 12345
B. 54321
C. 66666
D. 77777
12. How many times will the digit ‘7’ appear between 1 and 100?
A. 9
B. 10
C. 11
D. 20
13. In the game "21", if you start the game, what number should you aim to say first to guarantee a win?
A. 1
B. 2
C. 3
D. 4
14. In the game "99", what number should the second player aim to say to win?
A. 11
B. 10
C. 19
D. 99
15. How many supercells are possible in a 3x3 grid with 9 unique numbers?
A. 1
B. 3
C. 2
D. 4
16. What is the sum of the digits in the number 176?
A. 14
B. 13
C. 12
D. 15
17. The next palindrome after 111 is:
A. 121
B. 131
C. 141
D. 151
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