Mind Challenging Maths Riddle Questions #1
Mind Challenging Maths Riddle Questions #2
Mind Challenging Maths Riddle Questions #3
Mind Challenging Maths Riddle Questions #4
Mind Challenging Maths Riddle Questions #5
100
Which number replaces the question marks?
72
Moving m a clockwise spiral, numbers aro double tho square of the first 9 numbers.
100
Below is a pyramid of numbers where the number on each brick is the sum of two bricks below it. The numbers given will help you fill in the entire pyramid.
43.
100
Which are the weak links?
B.
100
Which number is missing?
64
Each box represents Ihe cube of numbers 1, 2,3 and 4.
100
What comes next?
5
The numbers are the alphabetical positions of the letters, spelling FACADE :
6-F; 1-A; 3-C; 1-A; 4-D; 5-E.
200
What is the next number in the sequence below?
The answer is 49. The difference between each two consecutive numbers grows in the order of 3, 5, 7, 9, 11, and 13 . All odd numbers.
200
The numbers 1 – 9 can be placed in the nine circles below in such a way that both sets of crossed circles can add up to 26. From the numbers already given, where would the number 1 go? It can be placed in either one of two circles.
7.
200
How many squares are there in this figure?
14 Squares.
200
Which number is missing from the box?
9
Each row; column and diagonal adds up to 15.
200
What number goes into the empty brackets?
5 6 2 5
The first number inside the brackets is the square root of the number outside the brackets. The remaining number inside the brackets is the square of the number outside the brackets.
300
Place the numbers 1 – 12 in the twelve circles below so the sum of each side of the triangle is 36. I will give you a head start by placing some of the numbers for you. (The numbers may be used once only).
4 .
300
In a group of 28 junior high school students, 7 take French, 10 take Spanish, and 4 take both languages. The students taking both French and Spanish are not counted with the 7 taking French or the 10 taking Spanish. How many students are not taking either French or Spanish?.
Seven students are not taking a language. Add 7 + 10 +4 to get 21.
Then subtract 21 from the total students: 28 – 21 = 7.
300
Now can you tell how many triangles are there in this figure?
There are 47 triangles.
300
Which number completes this sequence?
81
As you go down, subtract the sum of tne separate digits in each number from itself to give the next number.
300
What comes next in this series?
5040
Multiply each number by 2, 3, 4, 5 and 6 and (finally) 7.
400
What is the missing number in the pie below?
The missing number is 6.The two numbers opposite each other always total
21 : 15 + 6 = 21.
400
What number should replace the question mark?
86
Add five straightdown; Add ten sideways; Add fifteen diagonally.
400
Which number continues this sequence?
48
Numbers advance by 2, 4, 8 and 16.
400
Which number is missing from this wheel?
152
As you move clockwise multiple the previous number by 2 and ado 2, 3, 4, 5 and 6
400
What comes next in the series?
16
Each number reverses the previous number and adds 1 to each digit. Thus, in the first two terms, 16 reversed is 61, which then changes to 72. In the penultimate term, 50 reversed becomes 05, which in turn becomes 16 – by adding 1 to each digit.
500
Below is a pyramid of numbers where the number on each brick is the sum of two bricks below it. The numbers given will help you fill in the entire pyramid.
The missing number is 24.
The rule is to double the first number in each rectangle and place that number in the next box below it.
500
What number should replace the question mark to a definite rule?
201 (add digits to previous number).
500
Which number does not fit in this sequence?
8
The sequence follows the for¬mula double Ihe previous number then add 1. etc.
500
What is X?
6
The series is spaced incorrectly. When the spacing is correct it becomes: 2 4 8 16 32 64 128, 256, which is an obvious doubling-up series..
500
5 Friends live in the same road A, B, C, D, E.
The numbers of B, C, D when multiplied together equals 1260. The numbers B, C, D when added equal twice E’s number, and is even.A’s number is half as much again as E’s. The road numbers run from 2 to 222.What are the 5 house numbers?
A 36
B 4
C 9
D 35
E 24.