- A10
- B15
- C20
- D5
Step-by-Step Solution
Let the number of ₹20 notes be , so there are notes of ₹10. Total value: → → → . Check: . The trap 15 counts the ₹10 notes instead, and 20 is the note's value, not a count.
Answer: A) 10
Ravi has ₹350 in ₹10 and ₹20 notes only. He has 5 more ₹10 notes than ₹20 notes. How many ₹20 notes does he have?
Class 8Linear Equations in One VariableLinear Equations
Key idea: Translating word problems
Three steps:
1. **Pick a variable** for the unknown.
2. **Translate the words** into operations (sum, difference, product, quotient).
3. **Solve, then state the answer in the original units.**
Word clues: 'is/equals' = '='. 'sum' = +. 'difference' = −. 'product' = ×. 'quotient/per' = ÷. 'twice' = ×2. 'one more than' = +1. 'half of' = .
1. **Pick a variable** for the unknown.
2. **Translate the words** into operations (sum, difference, product, quotient).
3. **Solve, then state the answer in the original units.**
Word clues: 'is/equals' = '='. 'sum' = +. 'difference' = −. 'product' = ×. 'quotient/per' = ÷. 'twice' = ×2. 'one more than' = +1. 'half of' = .
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