Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 655 · 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 has 3 rows of apples, with 5 in each row. How many apples are in the box? (a) not enough info (b) 20 (c) 15 (d) 8
2. 2.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to change answers (d) to be sure of results
3. 3.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) what facts are given (d) the colour of ink
4. 4.🧩 Diya bought 2 mangoes for ₹110 in all. Each mango cost the same. What did one mango cost? (a) ₹110 (b) ₹55 (c) ₹60 (d) not enough info
5. 5.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
6. 6.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
7. 7.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
8. 8.🧩 Meera bought 4 mangoes for ₹180 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹45 (c) ₹50 (d) ₹180
9. 9.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
10. 10.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking your pet (d) asking the whole class
11. 11.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
12. 12.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, mangoes match (c) yes, it is certain (d) no, check more
13. 13.🧩 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
14. 14.🧩 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
15. 15.🧩 Saanvi bought 5 markers for ₹100 in all. Each marker cost the same. What did one marker cost? (a) ₹25 (b) ₹20 (c) ₹100 (d) not enough info
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.🧩 Vihaan bought 6 notebooks for ₹300 in all. Each notebook cost the same. What did one notebook cost? (a) ₹300 (b) ₹55 (c) ₹50 (d) not enough info
18. 18.🧩 Diya bought 4 kites and a bag for ₹310 in all. Each kite cost the same. What did one kite cost? (a) ₹310 (b) ₹306 (c) ₹77 (d) not enough info
19. 19.🧩 Ananya bought 2 pens for ₹120 in all. Each pen cost the same. What did one pen cost? (a) ₹60 (b) ₹65 (c) ₹120 (d) not enough info
20. 20.🧩 Ananya bought 2 mangoes and a cap for ₹170 in all. Each mango cost the same. What did one mango cost? (a) ₹85 (b) ₹170 (c) ₹168 (d) not enough info
21. 21.🧩 A box has 4 rows of oranges, with 6 in each row. How many oranges are in the box? (a) 10 (b) 30 (c) not enough info (d) 24
22. 22.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) not enough info (b) 40 (c) 8 (d) 4
23. 23.🧩 Meera bought 2 kites for ₹60 in all. Each kite cost the same. What did one kite cost? (a) ₹35 (b) ₹60 (c) not enough info (d) ₹30
24. 24.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
25. 25.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) a loud opinion (d) facts that support it
26. 26.🧩 Vihaan is 11 years old. Arjun is 2 years older than Vihaan. How old is Arjun? (a) not enough info (b) 14 (c) 13 (d) 2
27. 27.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 7 PM (b) 8 PM (c) not enough info (d) 5 PM
28. 28.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
29. 29.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
30. 30.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) never see dogs (c) that one dog barked (d) all dogs are mean
31. 31.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 5 PM (b) 2 PM (c) not enough info (d) 6 PM
32. 32.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 6 PM (b) not enough info (c) 8 PM (d) 9 PM
33. 33.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) not enough info (b) 80 (c) 8 (d) 16
34. 34.🧩 Vihaan bought 3 balls and a lunch box for ₹150 in all. Each ball cost the same. What did one ball cost? (a) ₹150 (b) ₹147 (c) not enough info (d) ₹50
35. 35.🧩 Aarav bought 6 balls for ₹270 in all. Each ball cost the same. What did one ball cost? (a) ₹50 (b) not enough info (c) ₹270 (d) ₹45
36. 36.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
37. 37.🧩 Arjun bought 5 notebooks for ₹250 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹50 (c) ₹55 (d) ₹250
38. 38.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
39. 39.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
40. 40.🧩 Arjun bought 3 kites and a lunch box for ₹50 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹16 (c) ₹50 (d) ₹47

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