Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 997 · 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.🧩 A box of oranges has 8 in each row. How many oranges are in the box? (a) 16 (b) 80 (c) 8 (d) not enough info
2. 2.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 4 PM (c) not enough info (d) 5 PM
3. 3.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
4. 4.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
5. 5.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
6. 6.🧩 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
7. 7.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) asking one friend (d) guessing
8. 8.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) yes, mangoes match (c) yes, it is certain (d) no mango is sweet
9. 9.🧩 Ishaan is 12 years old. Diya is older than Ishaan. How old is Diya? (a) 13 (b) 17 (c) 14 (d) not enough info
10. 10.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
11. 11.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
12. 12.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) dogs hate you (c) all dogs are mean (d) never see dogs
13. 13.🧩 Vihaan is 10 years old. Arjun is 4 years older than Vihaan. How old is Arjun? (a) 14 (b) not enough info (c) 15 (d) 4
14. 14.🧩 A box has 4 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 9 (b) not enough info (c) 20 (d) 25
15. 15.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the colour of ink (d) the page number
16. 16.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
17. 17.🧩 Arjun bought 3 kites for ₹60 in all. Each kite cost the same. What did one kite cost? (a) ₹60 (b) not enough info (c) ₹20 (d) ₹25
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: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
20. 20.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) a rumour (d) facts that support it
21. 21.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
22. 22.🧩 Tara is 10 years old. Vihaan is 3 years older than Tara. How old is Vihaan? (a) not enough info (b) 3 (c) 14 (d) 13
23. 23.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) not enough info (b) 70 (c) 7 (d) 14
24. 24.🧩 A box has 6 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 42 (b) 49 (c) not enough info (d) 13
25. 25.🧩 Meera bought 6 kites for ₹210 in all. Each kite cost the same. What did one kite cost? (a) ₹40 (b) not enough info (c) ₹210 (d) ₹35
26. 26.🧩 Saanvi bought 2 markers for ₹70 in all. Each marker cost the same. What did one marker cost? (a) ₹35 (b) not enough info (c) ₹70 (d) ₹40
27. 27.🧩 Aarav is 6 years old. Rohan is 5 years older than Aarav. How old is Rohan? (a) 11 (b) not enough info (c) 12 (d) 5
28. 28.🧩 Vihaan is 6 years old. Tara is 6 years older than Vihaan. How old is Tara? (a) 6 (b) 12 (c) 13 (d) not enough info
29. 29.🧩 Aarav bought 3 pens and a lunch box for ₹220 in all. Each pen cost the same. What did one pen cost? (a) ₹73 (b) ₹220 (c) ₹217 (d) not enough info
30. 30.🧩 A box of eggs has 9 in each row. How many eggs are in the box? (a) 9 (b) 90 (c) not enough info (d) 18
31. 31.🧩 Aarav is 10 years old. Saanvi is older than Aarav. How old is Saanvi? (a) not enough info (b) 11 (c) 12 (d) 15
32. 32.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
33. 33.🧩 Arjun is 7 years old. Vihaan is 4 years older than Arjun. How old is Vihaan? (a) not enough info (b) 12 (c) 11 (d) 4
34. 34.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
35. 35.🧩 Rohan bought 6 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹25 (c) ₹20 (d) ₹120
36. 36.🧩 Kabir bought 4 markers and a bag for ₹310 in all. Each marker cost the same. What did one marker cost? (a) ₹77 (b) ₹310 (c) ₹306 (d) not enough info
37. 37.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
38. 38.🧩 Diya is 7 years old. Arjun is 3 years older than Diya. How old is Arjun? (a) 3 (b) 10 (c) 11 (d) not enough info
39. 39.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
40. 40.🧩 A box has 7 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) 16 (b) 72 (c) 63 (d) not enough info

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