Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 249 · 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.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
2. 2.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
3. 3.🧩 Vihaan bought 3 balls for ₹45 in all. Each ball cost the same. What did one ball cost? (a) ₹45 (b) not enough info (c) ₹15 (d) ₹20
4. 4.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 6 PM (b) not enough info (c) 3 PM (d) 5 PM
5. 5.🧩 Diya bought 2 markers for ₹50 in all. Each marker cost the same. What did one marker cost? (a) ₹30 (b) not enough info (c) ₹25 (d) ₹50
6. 6.🥭 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 mango is sweet (c) no, check more (d) yes, it is certain
7. 7.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
8. 8.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
9. 9.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) all dogs are mean (d) dogs hate you
10. 10.🧩 Nisha bought 2 mangoes and a water bottle for ₹140 in all. Each mango cost the same. What did one mango cost? (a) ₹138 (b) not enough info (c) ₹140 (d) ₹70
11. 11.🧩 Tara is 9 years old. Meera is 2 years older than Tara. How old is Meera? (a) 11 (b) 12 (c) 2 (d) not enough info
12. 12.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
13. 13.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
14. 14.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) facts that support it (d) a guess
15. 15.🧩 Kabir bought 3 markers and a cap for ₹190 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹63 (c) ₹190 (d) ₹187
16. 16.🧩 Kabir is 9 years old. Rohan is older than Kabir. How old is Rohan? (a) not enough info (b) 11 (c) 14 (d) 10
17. 17.🧩 A box has 4 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) not enough info (b) 35 (c) 28 (d) 11
18. 18.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 4 (b) not enough info (c) 8 (d) 40
19. 19.🧩 A box has 4 rows of laddoos, with 7 in each row. How many laddoos are in the box? (a) 35 (b) 11 (c) not enough info (d) 28
20. 20.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
21. 21.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
22. 22.🧩 A box has 3 rows of apples, with 7 in each row. How many apples are in the box? (a) 10 (b) 21 (c) not enough info (d) 28
23. 23.🧩 A box has 3 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 28 (b) 10 (c) 21 (d) not enough info
24. 24.🧩 Vihaan bought 5 mangoes and a water bottle for ₹310 in all. Each mango cost the same. What did one mango cost? (a) ₹62 (b) not enough info (c) ₹310 (d) ₹305
25. 25.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
26. 26.🧩 Vihaan bought 2 notebooks for ₹110 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹110 (c) ₹55 (d) ₹60
27. 27.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
28. 28.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
29. 29.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
30. 30.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) what facts are given (d) the colour of ink
31. 31.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
32. 32.🧩 Ishaan is 6 years old. Rohan is 5 years older than Ishaan. How old is Rohan? (a) not enough info (b) 5 (c) 12 (d) 11
33. 33.🧩 A box of laddoos has 8 in each row. How many laddoos are in the box? (a) not enough info (b) 8 (c) 16 (d) 80
34. 34.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to waste time (d) to be sure of results
35. 35.🧩 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
36. 36.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
37. 37.🧩 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
38. 38.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) not enough info (b) 60 (c) 12 (d) 6
39. 39.🧩 Meera bought 4 kites for ₹80 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹20 (c) ₹80 (d) ₹25
40. 40.🧩 Ishaan bought 2 pens for ₹110 in all. Each pen cost the same. What did one pen cost? (a) ₹110 (b) not enough info (c) ₹60 (d) ₹55

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