1. What number Contine this sequence ?
59 / 73 / 83 / 94 / 107 / ?
Ans: 115
59 + 5 + 9 = 73
/
73 + 7 + 3 = 83
/
83 + 8 + 3 = 94
/
94 + 9 + 4 = 107
/
107 + 1 + 7 = 115
2. What is the factorial of 5 ?
Ans:120
5 x 4 x 3 x 2 x 1=120
3. What is the value 50 + - 19 ?
Ans: 37
The rule is to replace + - with -.
Thus 56 - 19 = 37
4. What number should replace the question mark ?
3 / 2 / 8 / 4
7 / 6 / 9 / 3
9 / 5 / 6 / 4
2 / 1 / 9 / ?
In each row multiply the first and third digits to obtain the number formed by the second and fourth digits.
Each row follows this rule: (First number)×(Third number)=Number formed by Second and Fourth numbers
Checking the first row: 3×8=24 - Matches 2/4
Checking the second row: 7×9=63 - Matches 6/3
Checking the third row: 9×6=54 - Matches 5/4
Finding the missing number in the fourth row: 2×9=18
So, the missing number should be 8, making the last row: 2/1/9/8
The missing number is 8.
5. What number should replace the question mark ?
32 21 ?
3 7 9 2 4 8
According to the hint, multiplying the bottom numbers should give the top numbers, but in a different arrangement.
The first two top numbers:
• 3×7=21 (This matches the second top number)
• 9×2=18 (This should be the missing number)
• 4×8=32 (This matches the first top number)
6. What number should logically replace the question mark ?
12 7 13 8 14 8
4 4 ?
21 26 16
The center number is the product of the top two numbers divided by the bottom number.
Given rule: Center number=Top left number×Top right number / Bottom Number
Checking the first pair: 12×7/21 = 84/21 = 4(Correct)
Checking the second pair: 13×8 / 26 =104/26 = 4(Correct)
Missing number: 14×8 / 16 = 112/16 = 7
7. What number should replace the question mark ?
A (6 + 15 + 19) - ( 7 + 11 + 10) = 12
B (17 + 19 + 2) - ( 14 + 16 + 2) = 6
C (11 + 7 + 5) - ( 3 + 8 + 2) = 10