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Amitabha
Questions and answers by visitors named
Amitabha
Questions (9)
A class of students had a test. If each boy had got 3 points more for the test, then the average result of the class would had
4 answers
asked by
Amitabha
1,300 views
John chooses a 5-digit positive integer and deletes one of its digits to make a 4-digit number. The sum of this 4-digit number
10 answers
4,373 views
In trapezium PQRS, the sides PQ and SR are parallel. Angle RSP is 120 . and RS = SP = 1/3PQ. What is the size of angle PQR ?
4 answers
2,896 views
Irina asked five of her students how many of the five of them had studied the day before. Pol said none, Berta said only one,
4 answers
1,286 views
Andrew and Daniel recently took part in a marathon. After they had finished, they noticed
that Andrew finished ahead of twice as
6 answers
1,975 views
Vasya wrote down several consecutive integers. Which of the following could not be the
percentage of odd numbers among them? (A)
3 answers
1,069 views
A three-digit integer has been divided by 9. As a result, the sum of the digits decrease by 9.
How many three-digit numbers
1 answer
453 views
Given a number, a strange calculator can only do the following: multiply it by 2 or by 3, or to
raise it to the power 2 or 3.
1 answer
502 views
Yurko saw a tractor slowly pulling a long pipe down the road. Yurko walked along beside the pipe in the same direction as the
2 answers
628 views
Answers (6)
Solved it!! Five options possible are: 1. abcde + abcd 2. abcde + abce 3. abcde + abde 4. abcde + acde 5. abcde + bcde But as last digit of sum is 3 then only (1) is possible. (e + e – cannot be an odd number) a must be 4 or 5 Then work out using 4 and
96
V=4/3 ¦Ðr^3 r -> 1.1 r V=4/3 ¦Ð¡¼(1.1r)¡½^3 V=4/3 ¦Ð x 1.331 r^3 So the increase is .331 or 33.1 %
Let initial price be P and initial consumption be C. new price = P - 0.25P = 0.75P new consumption = C + 0.25C = 1.25C Initial expenditure = P.C New expenditure = 0.75P x 1.25C = 0.9375 ~ 0.94 Ratio = 0.94/1= 0.94
Let number of families be x No. of children in with 3 = 20%x X 3 = 0.6x No. of children in with 2 = 30%x X 2 = 0.6x No. of children in with 1 = 40%x X 1 = 0.4x No. of children in with 0 = 10%x X 0 = 0 Average per house = (.6x + .6x + .4x)/x =1.6x/x =1.6
Room area = 26 X 15 = 390 Sq m Carpet area = 14 X 14 = 196 Sq m Area not carpeted = 390 - 196 = 194 Sq m
