Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 607 · 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.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
2. 2.🧩 A box of guavas has 6 in each row. How many guavas are in the box? (a) 12 (b) 60 (c) 6 (d) not enough info
3. 3.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 4 PM (d) 6 PM
4. 4.🧩 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
5. 5.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) not enough info (b) 5 PM (c) 9 PM (d) 8 PM
6. 6.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking your pet (d) asking the whole class
7. 7.🧩 Arjun bought 3 balls and a lunch box for ₹195 in all. Each ball cost the same. What did one ball cost? (a) ₹65 (b) not enough info (c) ₹192 (d) ₹195
8. 8.🧩 Tara is 7 years old. Meera is 8 years older than Tara. How old is Meera? (a) 8 (b) not enough info (c) 16 (d) 15
9. 9.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) 9 PM (d) not enough info
10. 10.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 3 PM (b) not enough info (c) 7 PM (d) 6 PM
11. 11.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) 6 PM (c) 7 PM (d) not enough info
12. 12.🐕 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
13. 13.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) a rumour (d) facts that support it
14. 14.🧩 Meera bought 6 mangoes and a water bottle for ₹390 in all. Each mango cost the same. What did one mango cost? (a) ₹65 (b) ₹390 (c) ₹384 (d) not enough info
15. 15.🧩 Saanvi bought 2 markers for ₹100 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹55 (c) ₹100 (d) ₹50
16. 16.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
17. 17.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
18. 18.🧩 Saanvi is 9 years old. Vihaan is older than Saanvi. How old is Vihaan? (a) 14 (b) 11 (c) not enough info (d) 10
19. 19.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
20. 20.🧩 Diya bought 4 kites and a cap for ₹210 in all. Each kite cost the same. What did one kite cost? (a) ₹52 (b) ₹210 (c) ₹206 (d) not enough info
21. 21.🧩 Kabir is 6 years old. Saanvi is older than Kabir. How old is Saanvi? (a) not enough info (b) 11 (c) 7 (d) 8
22. 22.🧩 Meera is 10 years old. Arjun is 3 years older than Meera. How old is Arjun? (a) not enough info (b) 14 (c) 3 (d) 13
23. 23.🧩 Meera is 6 years old. Nisha is older than Meera. How old is Nisha? (a) 11 (b) 7 (c) 8 (d) not enough info
24. 24.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
25. 25.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
26. 26.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) to be sure of results (d) for fun only
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.🥭 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
29. 29.🧩 Meera bought 2 pens for ₹30 in all. Each pen cost the same. What did one pen cost? (a) ₹20 (b) ₹15 (c) ₹30 (d) not enough info
30. 30.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the colour of ink (d) the page number
31. 31.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 16 (b) 80 (c) not enough info (d) 8
32. 32.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
33. 33.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 5 PM (b) 2 PM (c) 6 PM (d) not enough info
34. 34.🧩 Meera bought 5 mangoes and a water bottle for ₹255 in all. Each mango cost the same. What did one mango cost? (a) ₹250 (b) not enough info (c) ₹51 (d) ₹255
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.🧩 Arjun is 8 years old. Kabir is older than Arjun. How old is Kabir? (a) 13 (b) not enough info (c) 10 (d) 9
37. 37.🧩 Ananya bought 4 pens and a lunch box for ₹160 in all. Each pen cost the same. What did one pen cost? (a) ₹40 (b) not enough info (c) ₹160 (d) ₹156
38. 38.🧩 Saanvi bought 5 notebooks and a cap for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) ₹36 (b) not enough info (c) ₹180 (d) ₹175
39. 39.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
40. 40.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 50 (b) 10 (c) not enough info (d) 5

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