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a=32 and b =1 (a4-b4) = (a²+b²) (a+b) (a-b) ((32)4 – 14)/33×31× (210+1) = ((32)2 +1) (32+1) (32-1) / 33×31× (210+1) = ((25)2+1) ×33×31 /33×31× (210+1) = (210+1)/ (210+1) =1.
The marks scored by a boy in three subjects are in the ratio 2 : 3 : 4. Boy scored an overall aggregate of 75% in the exam. If the maximum marks in each...
In a school, 60% of the students pass and 30 fail. The number of students appearing from another school is 25 more and 20 more students pass than the fo...
Mahima’s expenditure and savings are in the ratio 5 : 3. Her income increases by 15%. Her expenditure also increases by 18%. By how many % does he...
Find the rate of interest if amount after 2 years on simple interest on a capital of Rs 1000 is Rs 1200.
In an exam, Rina scored 54% marks and failed by 80 marks whereas Tina scored 74% marks in the same exam and scored 60 marks more than the passing marks....
The respective ratio of monthly income of A to monthly income of B is 8:9, and A’s saving is (100/9)% more than B’s saving. Find the expenditure of ...
A towel was 75 cm broad and 120cm long. When bleached, it was to have lost 40% of its length and 20% breadth. The percentage of decrease in area is:
Person P allocated 65% of the money he had between X and Y in a ratio of 6:7. Both Y and X invested the amounts they received in ...
B invests 40% of his monthly salary on Travelling and 25% of remaining on Food. Again, he invested 20% of the remaining (after travelling and food expen...
The only expenses of Arun are on grocery, rent and fun expenses. Arun spent Rs. 5,250 on fun, amount spent by him on rent is Rs. 9,000 more than that on...
