Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 585 · 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.🧩 Tara is 8 years old. Vihaan is older than Tara. How old is Vihaan? (a) 13 (b) not enough info (c) 10 (d) 9
2. 2.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) dogs hate you (d) that one dog barked
3. 3.🥭 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, it is certain (c) no mango is sweet (d) yes, mangoes match
4. 4.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
5. 5.🧩 A box has 5 rows of laddoos, with 9 in each row. How many laddoos are in the box? (a) 54 (b) 45 (c) 14 (d) not enough info
6. 6.🧩 Diya bought 4 mangoes for ₹100 in all. Each mango cost the same. What did one mango cost? (a) ₹100 (b) ₹30 (c) not enough info (d) ₹25
7. 7.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
8. 8.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
9. 9.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
10. 10.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) 50 (b) 10 (c) 5 (d) not enough info
11. 11.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
12. 12.🧩 Vihaan is 10 years old. Saanvi is older than Vihaan. How old is Saanvi? (a) 15 (b) 11 (c) not enough info (d) 12
13. 13.🧩 Tara bought 3 pens for ₹120 in all. Each pen cost the same. What did one pen cost? (a) ₹45 (b) ₹40 (c) ₹120 (d) not enough info
14. 14.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
15. 15.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
16. 16.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
17. 17.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
18. 18.🧩 Before solving a word problem, first check… (a) what facts are given (b) the page number (c) your handwriting (d) the colour of ink
19. 19.🧩 A box has 4 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) not enough info (b) 36 (c) 45 (d) 13
20. 20.🧩 A box has 3 rows of oranges, with 8 in each row. How many oranges are in the box? (a) 32 (b) not enough info (c) 11 (d) 24
21. 21.🧩 A box of guavas has 8 in each row. How many guavas are in the box? (a) not enough info (b) 16 (c) 80 (d) 8
22. 22.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
23. 23.🧩 A box of eggs has 6 in each row. How many eggs are in the box? (a) 12 (b) 60 (c) not enough info (d) 6
24. 24.🧩 Tara bought 5 kites for ₹150 in all. Each kite cost the same. What did one kite cost? (a) ₹35 (b) ₹150 (c) ₹30 (d) not enough info
25. 25.🧩 Diya bought 6 notebooks for ₹240 in all. Each notebook cost the same. What did one notebook cost? (a) ₹45 (b) ₹40 (c) ₹240 (d) not enough info
26. 26.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 2 PM (c) 3 PM (d) not enough info
27. 27.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
28. 28.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) not enough info (b) 4 PM (c) 8 PM (d) 7 PM
29. 29.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
30. 30.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
31. 31.📊 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
32. 32.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
33. 33.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 6 PM (c) not enough info (d) 7 PM
34. 34.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) to change answers (d) for fun only
35. 35.🧩 A box has 5 rows of apples, with 8 in each row. How many apples are in the box? (a) not enough info (b) 40 (c) 48 (d) 13
36. 36.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
37. 37.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
38. 38.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) not enough info (b) 10 (c) 50 (d) 5
39. 39.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) 8 PM (c) not enough info (d) 7 PM
40. 40.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 3 PM (b) not enough info (c) 5 PM (d) 6 PM

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