Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 970 · 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.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) the page number (d) your handwriting
2. 2.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) 10 (b) 5 (c) 50 (d) not enough info
3. 3.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
4. 4.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking one friend (d) asking the whole class
5. 5.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
6. 6.🧩 A box has 3 rows of apples, with 6 in each row. How many apples are in the box? (a) 18 (b) 24 (c) not enough info (d) 9
7. 7.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to change answers (d) to be sure of results
8. 8.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
9. 9.🧩 Kabir bought 2 balls for ₹60 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹30 (c) ₹35 (d) ₹60
10. 10.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) never see dogs (d) that one dog barked
11. 11.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
12. 12.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
13. 13.🥭 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) no, check more (c) yes, mangoes match (d) yes, it is certain
14. 14.🧩 Saanvi is 8 years old. Arjun is 9 years older than Saanvi. How old is Arjun? (a) 18 (b) not enough info (c) 9 (d) 17
15. 15.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
16. 16.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
17. 17.🧩 Diya is 7 years old. Nisha is older than Diya. How old is Nisha? (a) 8 (b) not enough info (c) 12 (d) 9
18. 18.🧩 Kabir bought 3 kites and a cap for ₹170 in all. Each kite cost the same. What did one kite cost? (a) ₹170 (b) ₹56 (c) not enough info (d) ₹167
19. 19.🧩 Rohan bought 6 notebooks for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) not enough info (c) ₹90 (d) ₹15
20. 20.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 14 (b) 70 (c) 7 (d) not enough info
21. 21.🧩 Meera is 12 years old. Ananya is 3 years older than Meera. How old is Ananya? (a) 15 (b) 16 (c) not enough info (d) 3
22. 22.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
23. 23.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
24. 24.🧩 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
25. 25.🧩 Ananya bought 3 markers for ₹60 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹25 (c) ₹60 (d) ₹20
26. 26.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
27. 27.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 7 PM (c) 8 PM (d) not enough info
28. 28.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
29. 29.🧩 Tara bought 5 pens for ₹275 in all. Each pen cost the same. What did one pen cost? (a) ₹275 (b) not enough info (c) ₹55 (d) ₹60
30. 30.🧩 Arjun bought 4 kites and a water bottle for ₹180 in all. Each kite cost the same. What did one kite cost? (a) ₹180 (b) ₹176 (c) ₹45 (d) not enough info
31. 31.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
32. 32.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
33. 33.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 4 PM (c) 5 PM (d) 2 PM
34. 34.🧩 Aarav bought 2 balls for ₹70 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹35 (c) ₹40 (d) ₹70
35. 35.🧩 Diya bought 6 mangoes and a water bottle for ₹320 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹320 (c) ₹53 (d) ₹314
36. 36.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
37. 37.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
38. 38.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) facts that support it (d) a rumour
39. 39.🧩 A box has 3 rows of laddoos, with 7 in each row. How many laddoos are in the box? (a) not enough info (b) 28 (c) 21 (d) 10
40. 40.🧩 Kabir is 11 years old. Nisha is 3 years older than Kabir. How old is Nisha? (a) 3 (b) 14 (c) 15 (d) not enough info

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