alleryStart learning →The sum of three consecutive integers starting at n is
- 3n + 3
- 3n + 2
- n + 3
- 3n
Show answer and solution
Correct answer: A. 3n + 3
n + (n + 1) + (n + 2) = 3n + 3.
Olympiad (Class 7) Expressions Using Letter-Numbers — practice questions — page 2
Explore 45 free Expressions Using Letter-Numbers questions in Olympiad (Class 7) Mathematics. Open each question or exercise to read its content, reference answers and available explanation.
Practise Expressions Using Letter-Numbers with Quill →Expressions Using Letter-Numbers questions and exercises with answers
Showing questions 31–45 of 45.
The sum of three consecutive integers starting at n isRead the answer and worked solution →Odd numbers have the form 2n + 1. For n = 6 the odd number isRead the answer and worked solution →The nth term of a pattern is 4n + 1. Its 10th term isRead the answer and worked solution →A chain of n shapes uses 3n + 2 sticks. Sticks for 11 shapes?Read the answer and worked solution →If 5c + 3c + 10c = ₹900, what is c?Read the answer and worked solution →Which is the correct simplification of 3x + 4x?Read the answer and worked solution →A student writes 5a + 3b = 8ab. This is wrong becauseRead the answer and worked solution →Find x - (y - z) when x = 10, y = 7 and z = 2.Read the answer and worked solution →Add (3x + 2y) and (4x - 5y).Read the answer and worked solution →A triangle has sides x, x + 2 and 2x - 1. Its perimeter isRead the answer and worked solution →Fencing costs ₹15 per metre. A square plot has side s m. Cost of fencing?Read the answer and worked solution →A taxi charges ₹20 plus ₹12 per km. Fare for d km isRead the answer and worked solution →A notebook costs n and a pen costs p. Cost of 3 notebooks and 2 pens?Read the answer and worked solution →If p = 2q, the expression 3p + 2q equalsRead the answer and worked solution →A chain of n triangles uses 2n + 1 sticks. With 25 sticks, n isRead the answer and worked solution →
Worked practice questions
Odd numbers have the form 2n + 1. For n = 6 the odd number is
- 14
- 13
- 12
- 11
Show answer and solution
Correct answer: B. 13
2 x 6 + 1 = 13.
The nth term of a pattern is 4n + 1. Its 10th term is
- 40
- 44
- 41
- 45
Show answer and solution
Correct answer: C. 41
4 x 10 + 1 = 41.
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