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Math Puzzle 1

This math puzzle 1 is on logical reasoning,numbers,percentage and decimal fraction problems.
1)what does ♣ stand for?
7 ♣ 3 = 17
5 ♣ 3 = 13
8 ♣ 3 = 19
4 ♣ 2 = 10
2 ♣ 5 = 9
7 ♣ 9 = 23

2) What does ⊕ stand for?
7 ⊕ 3 = 4
2 ⊕ 1 = 1
9 ⊕ 6 = 3
8 ⊕ 4 = 4
8 ⊕ 3 = 5

3) Match the following numbers which give this relation: x → x = 8
A           B
8           17
25          0
37          28
20          45
34          26

4) A math maniac arranged his Δ as in the following pattern

a) If there are ten rows, can you find the total number of Δ without actually counting?
b) If there are 20 rows, how many Δ will be there in all?

5) Can you recognize a pattern for the total number of triangles? Fill this chart and try.
Rows 1 2 3 4 5 6 7
Total Δ 1 3 6 10 15 --- ---


6) How is 12% expressed as a decimal fraction?
(1) 0.5 (2) 0.05 (3) 0.005 (4) 0.0005

7) It was Wednesday on July 15, 1964. What was the day on July 15, 1965?
Thursday (2) Tuesday (3) Friday (4) None of these

8) If March 1 of a leap year fell three days after Friday, what day of the week will dawn on November 22?
Saturday (2) Sunday (3) Thursday (4) None of these

9) Find the next number in the series : 235, 346, 457……
578 (2) 568 (3) 468 (4) 558

10) How is 3/4 expressed as percentage?
0.75% (2) 60% (3) 75% (4) 7.5%

11)The perimeter of a rectangle is 60 metres. If its length is twice its breadth, then its area is:
200 m
2 (2) 180 m 2 (3) 160 m 2 (4) 220 m 2

12) A man spends a fixed amount per month on petrol. The trend with every hike in price of petrol is as follows:
$ /Liters: 1.5 2 3 4.5 6
Liters : 60 45 30 20 ?


What will be consumption when there price is Rs. 6 a litre?

(1) 12 (2) 15 (3) 18 (4) 13.5

13) In a class there are two sections A and B. If 10 students of section B shift over to section A, the strength of A becomes three times the strength of B. But if 10 students shift over from A to B, both A and B become equal in strength. How many students are there in sections A and B?
1)50 and 30 (2) 45 and 15 (3) 90 and 40 (4) 80 and 40

Math puzzle 1

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