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A weather bulletin lists how far each city's seasonal rainfall is from its normal amount: Jaipur −18 cm, Kochi +9 cm, Nagpur −4 cm, Patna 0 cm. Which city's rainfall was closest to normal?

Class 6IntegersIntegers
  • AJaipur
  • BKochi
  • CNagpur
  • DPatna

Step-by-Step Solution

Closest to normal means the smallest distance from zero, that is the smallest absolute value: |−18| = 18, |+9| = 9, |−4| = 4 and |0| = 0. Patna's 0 is the smallest, so its rainfall was exactly normal. The trap is choosing Nagpur because −4 looks like the smallest number on the list — it is a small value, but 0 is the one closest to normal.
Answer: D) Patna

Key idea: Adding integers — different signs

When two integers have **different signs**, subtract the smaller absolute value from the larger one and keep the sign of the larger absolute value. So 7 + (−3) = 4 (|7| > |−3|, so the answer is positive 4), and (−7) + 3 = −4 (|−7| > |3|, so the answer is negative 4). On the number line: a positive number moves right, a negative number moves left — they partially cancel.

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