alleryStart learning →Add up 2, 4, 6 and so on, ending at 20.
- 110
- 90
- 100
- 120
Show answer and solution
Correct answer: A. 110
2 × (1 + 2 + ... + 10) = 2 × 55 = 110.
Olympiad (Class 5) Arithmetic — practice questions — page 3
Explore 74 free Arithmetic questions in Olympiad (Class 5) Mathematics. Open each question or exercise to read its content, reference answers and available explanation.
Practise Arithmetic with Quill →Arithmetic questions and exercises with answers
Showing questions 61–74 of 74.
Add up 2, 4, 6 and so on, ending at 20.Read the answer and worked solution →Add every counting number from 1 up to 100. What total do you get?Read the answer and worked solution →6 pens cost Rs 90 in all. What do 9 pens of the same kind cost?Read the answer and worked solution →Work out the product of 4, 9 and 25.Read the answer and worked solution →What is 1000 divided by 8, and that answer divided by 5?Read the answer and worked solution →Add the first four multiples of 12.Read the answer and worked solution →Add 2 h 45 min and 1 h 30 min.Read the answer and worked solution →Add 4 kg 250 g and 2 kg 900 g.Read the answer and worked solution →A can holds 5 litres. After 2350 mL is used, how much is left?Read the answer and worked solution →A rope is 8 m long. After 3 m 75 cm is cut off, how long is it?Read the answer and worked solution →Name the biggest 3-digit multiple of 9.Read the answer and worked solution →Which 4-digit multiple of 5 is the greatest?Read the answer and worked solution →Fill the blank with the least digit so that 6_8 is a multiple of 3.Read the answer and worked solution →Multiply 25 by 4, divide by 5, then add 10. What is the result?Read the answer and worked solution →
Worked practice questions
Add every counting number from 1 up to 100. What total do you get?
- 5100
- 5500
- 5050
- 5000
Show answer and solution
Correct answer: C. 5050
50 pairs, each adding to 101, give 5050.
6 pens cost Rs 90 in all. What do 9 pens of the same kind cost?
- Rs 150
- Rs 135
- Rs 105
- Rs 120
Show answer and solution
Correct answer: B. Rs 135
One pen costs 90 ÷ 6 = 15, so 9 pens cost 135.
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