Year 5 Mental Maths Facts Quiz Fiendish Level. How many seconds in an hour? 3600 seconds.

Year 5 Mental Maths Facts Quiz

Fiendish Level

How many seconds in an hour?

• 3600 seconds

How many weeks in 11 years?

• 572 weeks

How many days are there in the first 6 months of the year

(assuming it is not a Leap Year)?

• 181 days

What is 13:13 in 12 hour (analogue) time?

• 1.13pm

What is 5 past midnight in 24 hour (digital ) time?

• 00:05

How many acute angles are there is this triangle?

• 3

Name this triangle

• scalene

What is the size of the missing angle?

• 78

?

19

46

37

What is the size of the missing angle?

• 124

?

35

21

What is the size of the missing angle?

• 156

?

41

73

What is a 4 as a decimal? 5

• 0.8

What is 1 as a percentage? 10

• 10%

What is 0.03 as a fraction?

• 3

100

What is 101% as a decimal?

• 1.01

What is 7% as a fraction?

• 7

100

List the first 10 prime numbers?

• 2, 3, 5, 7, 11, 13, 17, 19, 23, 29

What is 9 ?

• 81

2

What is the square root of 144?

• 12

What is the perimeter of this rectangle?

• 42.6 cm

2.3cm

19cm

What is the area of this rectangle?

• 43.7 cm

2.3cm

19cm

2

What is the volume of this cuboid?

• 2640 cm

12cm

20cm

3

11cm

Convert 4.05 kilograms to grams.

• 4050g

Convert 430 millimetres to metres.

• 0.43 m

What’s 10 ¾ litres in millilitres?

• 10750 ml

What’s 0.02 of a kilometre in metres?

• 20m

? + 0.15 = 1

• 0.85

How many faces does a pentagonal prism have?

• 8

What is this shape called?

• Octahedron

What is this shape called?

• Septagon/heptagon

How many vertices does a pentagonal based pyramid have?

• 6

What number does this Roman Numeral represent CX?

• 110

What number does this Roman Numeral represent MDLV?

• 1555