Parinama Academy Math bee - 6 -8 - may

How many four-digit numbers have the property that their digits, from left to right, are consecutive and in ascending order?

• 5

• 6

• 7

• 8

A rectangular chocolate bar is made of identical squares. Neil breaks off two complete strips of squares and eats the 12 squares he obtains. Later, Jack breaks off one complete strip of squares from the same bar and eats the 9 squares he obtains. How many squares of chocolate are left in the bar?

• 72

• 54

• 45

• 36

A jar one-fifth ( 1/5 ) filled with water weighs 560 g. The same jar four-fifth ( 4/5 ) filled with water weighs 740 g. What is the weight of the empty jar?

• 112

• 180

• 300

• 500

In a particular fraction the numerator and denominator are both positive. The numerator of this fraction is increased by 40%. By what percentage should its denominator be decreased so that the new fraction is double the original fraction?

• 10%

• 20%

• 30%

• 40%

A box contains only green, red, blue and yellow tokens. There is always at least one green tokens amongst any 27 tokens chosen from the box; always at least one red tokens amongst any 25 tokens chosen; always at least one blue amongst any 22 tokens chosen and always at least one yellow amongst any 17 tokens chosen. What is the largest number of tokens that could be in the box?

• 91

• 87

• 51

• 29

Which of the following fractions has the largest value?

• 7/8

• 66/77

• 555/666

• 4444/5555

On July 1 in Newbury the sun will rise at 04:53 and set at 21:25. The local noon will be exactly halfway between these times. At what time will the local noon be in Newbury on July 1? A. 11:08 B. 12:39 C. 13:09

• 11:08

• 12:39

• 13:09

• 01:18

. John needs exactly 2002 eggs as soon as possible. Each of his 23 hens lays an egg every day. How many days (including the first day) does John have to wait and how many eggs will be left after he takes his 2002 eggs?

• 87 days, no eggs left

• 87 days, one egg left

• 88 days, 20 eggs left

• 88 days, 22 eggs left

. In Canada part of the people can speak only English, part of them - only French, and part of them can speak both languages. A survey shows that 85% of the population speak English, 75% of the population speak French. How many per cent of the population can speak both languages?

• 50

• 57

• 25

• 60

In a children's game you call out all the numbers from 1 to 100. You clap every time you say either a multiple of 3 or a number ending by 3. How many times would you clap?

• 30

• 33

• 36

• 39