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Important Formulas
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Banker's Discount
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Calendar
Chain Rule
Clock
Compound Interest
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Height and Distance
Logarithm
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Odd Man Out and Series
Partnership
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Pipes and Cistern
Probability
Problems on Ages
Problems on H.C.F & L.C.M
Problems on Numbers
Problems on Trains
Profit & Loss
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Simple Interest
Simplification
Square Root and Cube Root
Stocks and Shares
Surds and Indices
Time and Distance
Time and Work
True Discount
Volume and Surface Area
Practice Questions
Note: You can add tough questions into your favourite list for second revision. 
The sum of three numbers is 98. If the ratio of the first to the second is 2 : 3 and that of the second to the third is 5 : 8, then the second number is :  
A.  20 [Wrong Answer] 
B.  30 [Correct Answer] 
C.  48 [Wrong Answer] 
D.  58 [Wrong Answer] 
View Answer
Explanation:
Answer : B Discuss it below :Let the three parts be A, B, C Then, A : B = 2 : 3 and B : C = 5 : 8 A:B:C= 2 : 3 : B = Click here for more comments 
The ratio of the number of boys and girls in a college is 7 : 8. If the percentage iikcrease in the number of boys and girls be 20% and 10% respectively, what will be the new ratio ?  
A.  8 : 9 [Wrong Answer] 
B.  17 : 18 [Wrong Answer] 
C.  21 : 22 [Correct Answer] 
D.  Cannot be determined [Wrong Answer] 
View Answer
Explanation:
Answer : C Discuss it below :Originally, let the number of boys and girls in the college be 7x and 8x respectively. Their increased number is (120% of 7x) and (110% of 8x), i . e . Click here for more comments 
A surn of money is to be distributed among A, B, C, D in the proportion of 5 : 2 : 4 : 3. If C gets Rs. 1000 more than D, what is B's share ?  
A.  Rs. 500 [Wrong Answer] 
B.  Rs. 1500 [Wrong Answer] 
C.  Rs. 2000 [Correct Answer] 
D.  None of these [Wrong Answer] 
View Answer

Two numbers are respectively 20% and 50% more than a third number. The ratio of the two numbers is :  
A.  2 : 5 [Wrong Answer] 
B.  3 : 5 [Wrong Answer] 
C.  4 : 5 [Correct Answer] 
D.  6 : 7 [Wrong Answer] 
View Answer
Explanation:
Answer : C Discuss it below :Let the third number be x. Then, first number = 120% of x = Click here for more comments 
Two numbers are in the ratio 3 : 5. If 9 is subtracted from each, the new numbers are in the ratio 12 : 23. The smaller number is :  
A.  27 [Wrong Answer] 
B.  33 [Wrong Answer] 
C.  49 [Correct Answer] 
D.  55 [Wrong Answer] 
View Answer
Explanation:
Answer : C Discuss it below :Let the numbers be 3x and 5x. Then, ^{5x  9} ^{23} = 23(3x  9) = 12(5x 9) = 9x = 99 <=> x = 11. so The smaller number = (3 x 11) = 33. Click here for more comments 
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