Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 701 · 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.📝 What does “evidence” mean? (a) a guess (b) facts that support it (c) a rumour (d) a loud opinion
2. 2.🧩 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
3. 3.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
4. 4.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) that one dog barked (d) never see dogs
5. 5.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to be sure of results (d) to waste time
6. 6.🧩 Nisha bought 6 pens for ₹210 in all. Each pen cost the same. What did one pen cost? (a) ₹35 (b) ₹210 (c) not enough info (d) ₹40
7. 7.🧩 Ishaan bought 4 balls and a bag for ₹310 in all. Each ball cost the same. What did one ball cost? (a) ₹77 (b) not enough info (c) ₹306 (d) ₹310
8. 8.🧩 Vihaan bought 6 pens for ₹270 in all. Each pen cost the same. What did one pen cost? (a) ₹50 (b) ₹45 (c) not enough info (d) ₹270
9. 9.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 3 PM (c) not enough info (d) 5 PM
10. 10.🧩 Arjun bought 2 pens and a water bottle for ₹80 in all. Each pen cost the same. What did one pen cost? (a) ₹40 (b) not enough info (c) ₹80 (d) ₹78
11. 11.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) no, check more (c) no mango is sweet (d) yes, mangoes match
12. 12.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
13. 13.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking your pet (c) asking one friend (d) asking the whole class
14. 14.🧩 Diya bought 2 markers and a water bottle for ₹90 in all. Each marker cost the same. What did one marker cost? (a) ₹88 (b) ₹45 (c) not enough info (d) ₹90
15. 15.🧩 Saanvi is 7 years old. Rohan is older than Saanvi. How old is Rohan? (a) not enough info (b) 12 (c) 9 (d) 8
16. 16.🧩 Kabir is 12 years old. Rohan is 4 years older than Kabir. How old is Rohan? (a) not enough info (b) 17 (c) 16 (d) 4
17. 17.🧩 Ishaan bought 4 balls for ₹100 in all. Each ball cost the same. What did one ball cost? (a) ₹100 (b) not enough info (c) ₹25 (d) ₹30
18. 18.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the page number (d) the colour of ink
19. 19.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) 5 (b) 10 (c) 50 (d) not enough info
20. 20.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
21. 21.🧩 Diya is 6 years old. Arjun is 7 years older than Diya. How old is Arjun? (a) 14 (b) 13 (c) not enough info (d) 7
22. 22.🧩 Meera bought 2 markers for ₹20 in all. Each marker cost the same. What did one marker cost? (a) ₹10 (b) ₹15 (c) not enough info (d) ₹20
23. 23.🧩 Saanvi bought 4 notebooks and a bag for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹100 (b) ₹25 (c) ₹96 (d) not enough info
24. 24.🧩 A box has 3 rows of eggs, with 8 in each row. How many eggs are in the box? (a) 11 (b) not enough info (c) 32 (d) 24
25. 25.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 16 (b) 8 (c) 80 (d) not enough info
26. 26.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
27. 27.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
28. 28.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
29. 29.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
30. 30.🧩 A box has 8 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 36 (b) 12 (c) 32 (d) not enough info
31. 31.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 8 PM (c) 7 PM (d) not enough info
32. 32.🧩 Ishaan is 7 years old. Rohan is 6 years older than Ishaan. How old is Rohan? (a) 6 (b) not enough info (c) 13 (d) 14
33. 33.🧩 Rohan bought 2 balls for ₹30 in all. Each ball cost the same. What did one ball cost? (a) ₹30 (b) ₹20 (c) ₹15 (d) not enough info
34. 34.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
35. 35.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
36. 36.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) not enough info (c) 7 PM (d) 8 PM
37. 37.🧩 Vihaan bought 6 kites and a cap for ₹310 in all. Each kite cost the same. What did one kite cost? (a) ₹310 (b) ₹51 (c) not enough info (d) ₹304
38. 38.🧩 Diya bought 5 kites for ₹75 in all. Each kite cost the same. What did one kite cost? (a) ₹15 (b) ₹20 (c) not enough info (d) ₹75
39. 39.🧩 Arjun is 11 years old. Diya is older than Arjun. How old is Diya? (a) not enough info (b) 16 (c) 13 (d) 12
40. 40.🧩 A box of laddoos has 7 in each row. How many laddoos are in the box? (a) 14 (b) 70 (c) not enough info (d) 7

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