Algebra questions with answers
36 multiple-choice questions. Open any question for its answer and explanation.
- If the average of a number, its 50% and its 25% is 210, the number is
- In a camp of persons there was a provision of food for 42 days. After 10 days the number of persons increased by 300 as a result of which the food lasted only 24 days. What was the number of persons in the camp, originally ?
- A father is now three times as old as his son. Five years back he was four times as old as his son. The age of the son is
- The number 729 is the square of
- It has been observed that four consecutive years, the number of car manufactured by a company has been doubled over the previous year’s. If the average number of cars manufactured by the company in four years is 750, the number of cars manufactured during the fourth year will be
- The average marks of eleven students is 31.0 and that of the first six students is 31.5, while that of the last six students is 30.Then the marks of the sixth student are:
- If three years ago the average age of a family of 6 members was 19 years. A baby having been born, the average age of the family now remains the same.The age or baby in years is
- 1.A mother is three times the age of her son. Five (5) years back the son was l/6'h the age of his father. If father is 5 years older than the mother, what is the age of the son.
- The amount of water in a barrel doubles every minute. Barrel fills up completely in 60 minutes. In how much time will it be half fulled ?
- If a, b, c are integers, then distributive law for multiplication over addition is
- The mean of four observations a, b, c, d, is If A = a - 5, B = b -10, C = c -25 and D = d - 40, then mean of A, B, C, D is
- How many trucks will carry 540 tons in 30 days,if each truck carries 3 tons per day ?
- If 22x + 4 =16x, then 2x is equal to
- In an examination, the ratio of passes to failures was 4 :If 30 students less had appeared and 20 less passed, the ratio of passes to failures would have been 5 : How many students appeared for the examination?
- If P denotes '+', R denotes 'x', S denotes '-' and T denotes '÷', then the value of5 R 9 P 7 S 9 T 3 P 6 is
- The average age of a class was 15 years. When 5 boys whose average age was 12 years and 6 months were admitted in the class, the average was reduced to 6 months. How many students were there in the class originally?
- It the Arithmetic Mean (AM) of two numbers is 6.5 and their Geometric Mean (GM) is 6, what will be the two numbers?
- If ‘MALE’ can be written as 15 + 3 + 14 + 7, then ‘BHEL’ can be written as
- Four years ago the average age of a family of four members was 18 years. During this period a new baby was born. If at present the average age of the family is the same as it was four years ago, then the present age of the baby is (yrs.)
- An organization has 80 male and 20 female employees. The average salary of male employees is ` 25,000, but the average salary of female employees is ` 17,What will be the combined average of the salary ?
- The average of five numbers is 8 and the average of the last three number is Then the average of first two numbers is
- Three years back the average age of a family of 6 members was 19 years. A baby having being born, the average of the family remains the same. Then the age of the baby (in years) is
- The average marks of eleven students is 31.0 and that of the first six students is 31.5 while that of the last six students is 30.The mark of the sixth student is
- The value of {(0.01) + (0.01)2} is
- Consider the series X1, X2, ……..Xn with G.M. G1 and Y1, Y2 ,……. Yn with G.M. G2 and define Zi=Xi/Yi, i=1,2,……….. n, then the G.M. of Z's is