Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 159 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.🧩 Aarav is 9 years old. Saanvi is older than Aarav. How old is Saanvi? (a) not enough info (b) 14 (c) 10 (d) 11
2. 2.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
3. 3.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) not enough info (b) 2 PM (c) 6 PM (d) 5 PM
4. 4.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) 9 (b) 90 (c) 18 (d) not enough info
5. 5.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
6. 6.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
7. 7.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
8. 8.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a rumour (d) a guess
9. 9.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) the page number (d) what facts are given
10. 10.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
11. 11.🧩 A box has 6 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 42 (b) 12 (c) 36 (d) not enough info
12. 12.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
13. 13.🧩 Saanvi bought 5 mangoes for ₹50 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹15 (c) ₹10 (d) ₹50
14. 14.🧩 A box has 8 rows of guavas, with 4 in each row. How many guavas are in the box? (a) not enough info (b) 32 (c) 12 (d) 36
15. 15.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
16. 16.🧩 Arjun bought 3 notebooks for ₹150 in all. Each notebook cost the same. What did one notebook cost? (a) ₹55 (b) ₹150 (c) not enough info (d) ₹50
17. 17.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 50 (b) 5 (c) not enough info (d) 10
18. 18.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to waste time (c) to change answers (d) for fun only
19. 19.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
20. 20.🧩 A box has 3 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) 15 (b) 8 (c) not enough info (d) 20
21. 21.🧩 Tara bought 3 pens and a bag for ₹270 in all. Each pen cost the same. What did one pen cost? (a) ₹270 (b) ₹267 (c) not enough info (d) ₹90
22. 22.🧩 A box has 6 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) not enough info (b) 13 (c) 42 (d) 49
23. 23.🧩 A box has 3 rows of oranges, with 8 in each row. How many oranges are in the box? (a) 11 (b) not enough info (c) 24 (d) 32
24. 24.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
25. 25.🧩 A box has 5 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 9 (b) not enough info (c) 20 (d) 24
26. 26.🧩 Diya bought 4 kites for ₹100 in all. Each kite cost the same. What did one kite cost? (a) ₹25 (b) ₹30 (c) not enough info (d) ₹100
27. 27.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
28. 28.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
29. 29.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
30. 30.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 7 PM (b) 3 PM (c) 6 PM (d) not enough info
31. 31.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
32. 32.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
33. 33.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) 6 PM (c) 5 PM (d) not enough info
34. 34.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
35. 35.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
36. 36.🧩 Diya bought 6 kites for ₹150 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹30 (c) ₹25 (d) ₹150
37. 37.🧩 Vihaan bought 3 kites and a bag for ₹255 in all. Each kite cost the same. What did one kite cost? (a) ₹252 (b) ₹85 (c) ₹255 (d) not enough info
38. 38.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) no, check more (c) yes, it is certain (d) no mango is sweet
39. 39.🧩 Ananya is 6 years old. Saanvi is 7 years older than Ananya. How old is Saanvi? (a) 7 (b) not enough info (c) 14 (d) 13
40. 40.🧩 Diya bought 2 balls for ₹50 in all. Each ball cost the same. What did one ball cost? (a) ₹50 (b) ₹30 (c) ₹25 (d) not enough info

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